Hello
Has anyone a “proper” one of these that they can take a photo of for me so I know what to search for
Thanks
Terry
PS I have a 18ACR Lucas Alternator
Terry, do you mean the mount on the block or the slotted adjustment piece that pivots on a front cover bolt?
I have an alternator but not the Lucas
Greg Z
Greg
The one on the engine block. I beleive it lifts the alternator slightly compared to the RHD bracket (I had one of these on my old +2)
Thanks
Terry
That’s for a RHD car. I have been talking to Sean at Spyder and we don’t think it will fit.
I think it needs to be the same sort of thing with the mounting higher
Thanks
Terry
Alan
Thats the one. Could you measure center to center how much higher the alternator holes are from the holes in the block.
Also how far out from the block are the alternator holes.
Thanks
Terry
I’m not at home at the moment but I should get a chance tomorrow.
Alan
Thanks Alan
Terry
With the alternator in place you can’t really see from above, you may be able see from below but I can only work on the car outdoors and it’s snowing.
Alan.
If it’s the one (A050E0554) used on the +2 Fed cars, I have one on the bench and can get your measurements this morning.
Bud
I think it is, that would be great
Alan
Stay inside, don’t go out in the snow!
Thanks
Terry
Looks to be 0.575" or between 9/16" & 37/64". That comes in at very close to 14.5mm, although I don’t know why it would be metric. 
Stay warm you guys!
Thanks Bud …so a tad over half a ninch!
Cheers
Terry
Those brackets were fitted to both LHD and RHD late plus 2’s with alternators - I have always thought they were identical in mounting height - but if they have different part numbers then I must have been wrong 
or maybe some other difference for the different part numbers. its strange to make 2 versions when the LHD version would suit both LHD and RHD cars 
I would love to see the differences in dimensions - I have a RHD one and will measure it up
Just as a side note these are especially valuable for a high reving race twin cams if you use an alternator as they dont break with all the engine vibration you get above 8000 rpm around the front of the engine. I am just replacing the alternator top adjusting arm today on the elan as they fatigue and fail after about 2 years of racing. I am on version 5 now and each one has been stronger than the last - maybe this one will not fail.
Not easy to find them and a good candidate for someone to CNC machine a batch for sale in both LHD and RHD versions maybe
The one that came with my Plus 2 now resides on my Elan and an new one for the plus 2 plus a spare would be nice
cheers
Rohan
When I bought my bracket I didn’t know there were two types and ended up with a LHD one. It’s OK on a RHD car, I assume the difference is to do with clearance for the steering column.
Looking at the workshop manual again I see there are different part numbers for the adjusting strap and fan belt as well, I’m using the RHD parts without any problems.
Alan.
Rohan
Forgive me for being silly but why is it that the brackets break and why is the mounting for the alternator so much beefier than the dynamo, as I think I could make the dynamo bracket work with a length of threaded rod?
The engine vibrates the same but I suppose the alternator has a smaller pulley and spins faster??
Do you think my dynamo bracket would be Ok for an alternator for normal road use?
Thanks
Terry
I suspect the alternator is more vulnerable to a resonance due the inherent vibration due to its moountnig geometry and because more of its weight is concentrated up near the nose where the twink vibrates the most, its not due to the alternator spin speed itself. The heavy standard lotus bracket is not really needed for road use as it only becomes any issue with 8000 rpm plus engines in my experience. My plus 2 has a simple welded up bracket in a similar style to the standard dynamo mount for the bottom alternator mount and the standard top connection and has never had problems.
In my race engines I cracked the same simple welded lower bracket on several occassion and also cracked a block bolt hole where it mounts before swapping the mount from the plus 2. I have also cracked the front cover where the adjusting top link goes and now use a reinforcing plate that picks up the 3 bolts on that side of the cover. The top link still breaks ( hopefully not now) and the alternators have a limited life as their internals shake to bits but now it mainly stays in place
cheers
Rohan
A long rod through the standard dynamo bracket may work ok but could be subject to fatigue failure as it will see bending due to vibration
RHD , the position for the alternator is about 1.5 inches lower than on LHD.
The problem I have is I need to find a LHD one … or get someone to make one 
Terry